| Bartels Home Improvements | Bartels Home Improvements | guy@infinitydesignbuild.com | (858) 844 5646 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Bartlett General Contracting | Ian Thomas Bartlett | — | (619) 818 8353 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Bartocci Development | Joseph Louis Belmonte | — | (619) 522 6789 | GC, remodel, ADU | Coronado · San Diego County | — | — |
| Barton & Barton Construction | Eric Christopher Barton | — | (760) 909 9414 | GC, remodel, ADU | Vista · San Diego County | — | — |
| Barton + Barton Construction LLC | Barton Candy | — | (858) 847 2715 | GC, remodel, ADU | Del Mar · San Diego County | — | — |
| Barton Electric INC | Michael David Barton | — | (760) 497 8504 | Electricians | Valley Center · San Diego County | — | — |
| Barton Painting | Barton Painting | — | (310) 748 9298 | Windows, patio, painters | Escondido · San Diego County | — | — |
| Baruxes Builder | Baruxes Builder | — | (760) 224 7808 | GC, remodel, ADU | Carlsbad · San Diego County | — | — |
| Bas Builders INC | Brad Lewis Logan | — | (760) 815 4204 | GC, remodel, ADU | Ramona · San Diego County | — | — |
| Bas General Contractor INC | Belen Avelar Silva | guy@infinitydesignbuild.com | (760) 801 2065 | GC, remodel, ADU | Vista · San Diego County | — | — |
| Basave Builds INC | Samuel Moreno-Basave | guy@infinitydesignbuild.com | (619) 980 2359 | GC, remodel, ADU | La Mesa · San Diego County | — | — |
| Base Concrete | Base Concrete | — | (760) 445 5486 | Other | Escondido · San Diego County | — | — |
| Base Dynamics INC | Jonathan Andrew Zar | info@base-dynamics.com | (310) 529 4423 | GC, remodel, ADU | Cardiff · San Diego County | — | — |
| Basecamp Construction Co | Jeremiah Bautista Artates | info@basecamp.mt | (949) 702 2859 | GC, remodel, ADU | Chula Vista · San Diego County | — | — |
| Basehit Services INC | Richard James Jr Somers | nic@basehitservices.com | (858) 779 0079 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Baseline Electric | Brett Eric Tyler Villalobos | — | (626) 665 1123 | Electricians | Escondido · San Diego County | — | — |
| Baseline Tennis Court Surfacing & Supplies | Ted Ferandell Miller | autonerdmedia@gmail.com | (858) 472 1955 | Other | Carlsbad · San Diego County | — | — |
| Bashaw Electric INC | Joseph Gene Bashaw | — | (619) 873 7988 | Electricians | San Diego · San Diego County | — | — |
| Bashore Cabinets | Bashore Cabinets | — | (760) 212 1245 | Other | Oceanside · San Diego County | — | — |
| Bashys Painting | Bashys Painting | — | (619) 206 6644 | Windows, patio, painters | San Diego · San Diego County | — | — |
| Basile Construction INC | Jeffrey James Reese | — | (858) 586 7800 | Other | San Diego · San Diego County | — | — |
| Basile INC | Paul Joseph Basile | firstname@basile.com | (619) 944 2400 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Bassett Construction | Kirk Alan Bassett | — | (949) 498 4697 | GC, remodel, ADU | Fallbrook · San Diego County | — | — |
| Bastida Construction | Ricardo Ismael Bastida Luna | buildzoomsupport@blockrenovation.com | (760) 535 9105 | GC, remodel, ADU | San Diego · San Diego County | — | — |
| Bastien Construction | Renaldo Philip Bastien | — | (619) 871 2356 | GC, remodel, ADU | Escondido · San Diego County | — | — |
| Batco Carpentry | Batco Carpentry | — | (760) 315 6170 | Other | San Diego · San Diego County | — | — |
| Bateman Construction INC | Richard Brian Bateman | — | (619) 575 8484 | GC, remodel, ADU | Imperial Beach · San Diego County | — | — |
| Bath Fitter | Starnino Justin | — | (619) 447 2000 | Other | El Cajon · San Diego County | — | — |
| Batsch & Son Construction | Charles Warren Batsch | — | (619) 787 0778 | GC, remodel, ADU | Coronado · San Diego County | — | — |
| Bauer Construction INC | Richard Halair Sousanes | — | (760) 672 5552 | GC, remodel, ADU | Solana Beach · San Diego County | — | — |
| Bauer Electric INC | Roland Myron Bauer | — | (858) 864 8355 | Electricians | Valley Center · San Diego County | — | — |
| Bauer General Contracting INC | Tyler James Welch | — | (619) 990 2364 | GC, remodel, ADU | Vista · San Diego County | — | — |
| Bauer Pacific Construction INC | David Richard Bauer | — | (858) 523 9900 | GC, remodel, ADU | Solana Beach · San Diego County | — | — |
| Bauers Construction | Noah Russell Bauers | — | (760) 420 7692 | GC, remodel, ADU | Ramona · San Diego County | — | — |
| Baughman Wallcovering | Baughman Wallcovering | baughmanwallcovering@cox.net | (760) 945 7169 | Other | Oceanside · San Diego County | — | — |
| Baustista Remodeling | Baustista Remodeling | — | (760) 277 8156 | GC, remodel, ADU | Escondido · San Diego County | — | — |
| Bautista Gardening Services INC | Ivan Bautista | — | (848) 218 2032 | Windows, patio, painters | Pauma Valley · San Diego County | — | — |
| Bautista Roofing | Juan Rafael Bautista Gabino | info@christianroofing.com | (619) 431 8726 | Other roofers | Lemon Grove · San Diego County | — | — |
| Bavaro Joseph Electrical | Joseph Lee Bavaro | — | (760) 450 4237 | Electricians | Fallbrook · San Diego County | — | — |
| Baxter Pacific Construction INC | Brandon Keith Baxter | info@baxterpacific.com | (760) 330 1140 | GC, remodel, ADU | San Marcos · San Diego County | — | — |